Staff Report and WELO Ordinance - StopWaste.Org

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5641.1, 5641.2, 5641.3, 5641.4, 5641.5, 5641.6, 6701, 7027.5 of the Business andProfessions Code, Section 832.27 of Title16 of the California Code of Regulations, and Section6721 of the Food and Agriculture Code.)Note: Authority Cited: Section 65595, Government Code. Reference: Section 65596,Government Code and Section 1351, Civil Code.§ 492.7 Irrigation Design Plan.(a) For the efficient use of water, an irrigation system shall meet all the requirements listed inthis section and the manufacturers' recommendations. The irrigation system and its relatedcomponents shall be planned and designed to allow for proper installation, management, andmaintenance. An irrigation design plan meeting the following design criteria shall be submittedas part of the Landscape Documentation Package.(1) System(A) Dedicated landscape water meters are highly recommended on landscape areas smallerthan 5,000 square feet to facilitate water management.(B) Automatic irrigation controllers utilizing either evapotranspiration or soil moisture sensordata shall be required for irrigation scheduling in all irrigation systems.(C) The irrigation system shall be designed to ensure that the dynamic pressure at eachemission device is within the manufacturer's recommended pressure range for optimalperformance.1. If the static pressure is above or below the required dynamic pressure of the irrigationsystem, pressure-regulating devices such as inline pressure regulators, booster pumps, orother devices shall be installed to meet the required dynamic pressure of the irrigation system.2. Static water pressure, dynamic or operating pressure. and flow reading of the water supplyshall be measured at the point of connection. These pressure and flow measurements shall beconducted at the design stage. If the measurements are not available at the design stage, themeasurements shall be conducted at installation.(0) Sensors (rain, freeze, wind, etc.), either integral or auxiliary, that suspend or alter irrigationoperation during unfavorable weather conditions shall be required on all irrigation systems, asappropriate for local climatic conditions. Irrigation should be avoided during windy or freezingweather or during rain.(E) Manual shut-off valves (such as a gate valve, ball valve, or butterfly valve) shall berequired, as close as possible to the point of connection of the water supply, to minimize waterloss in case of an emergency (such as a main line break) or routine repair.(F) Backflow prevention devices shall be required to protect the water supply fromcontamination by the irrigation system. A project applicant shall refer to the applicable localagency code (i.e., public health) for additional backflow prevention requirements.(G) High flow sensors that detect and report high flow conditions created by system damage ormalfunction are recommended.(H) The irrigation system shall be designed to prevent runoff, low head drainage, overspray, orother similar conditions where irrigation water flows onto non-targeted areas, such as adjacentproperty, non-irrigated areas, hardscapes, roadways, or structures.(I) Relevant information from the soil management plan, such as soil type and infiltration rate,shall be utilized when designing irrigation systems.(J) The design of the irrigation system shall conform to the hydrozones of the landscapedesign plan.4414
(K) The irrigation system must be designed and installed to meet, at a minimum, the irrigationefficiency criteria as described in Section 492.4 regarding the Maximum Applied WaterAllowance.(L) It is highly recommended that the project applicant or local agency inquire with the localwater purveyor about peak water operating demands (on the water supply system) or waterrestrictions that may impact the effectiveness of the irrigation system.(M) In mulched planting areas, the use of low volume irrigation is required to maximize waterinfiltration into the root zone.(N) Sprinkler heads and other emission devices shall have matched precipitation rates, unlessotherwise directed by the manufacturer's recommendations.(0) Head to head coverage is recommended. However, sprinkler spacing shall be designed toachieve the highest possible distribution uniformity using the manufacturer'srecommendations.(P) Swing joints or other riser-protection components are required on all risers subject todamage that are adjacent to high traffic areas.(0) Check valves or anti-drain valves are required for all irrigation systems.(R) Narrow or irregularly shaped areas, including turf, less than eight (8) feet in width in anydirection shall be irrigated with subsurface irrigation or low volume irrigation system.(S) Overhead irrigation shall not be permitted within 24 inches of any non-permeable surface.Allowable irrigation within the setback from non-permeable surfaces may include drip, drip line,or other low flow non-spray technology. The setback area may be planted or unplanted. Thesurfacing of the setback may be mulch, gravel, or other porous material. These restrictionsmay be modified if:1. the landscape area is adjacent to permeable surfacing and no runoff occurs; or2. the adjacent non-permeable surfaces are designed and constructed to drain entirely tolandscaping; or3. the irrigation designer specifies an alternative design or technology, as part of theLandscape Documentation Package and clearly demonstrates strict adherence to irrigationsystem design criteria in Section 492.7 (a)(1)(H). Prevention of overspray and runoff must beconfirmed during the irrigation audit.(T) Slopes greater than 25% shall not be irrigated with an irrigation system with a precipitationrate exceeding 0.75 inches per hour. This restriction may be modified if the landscapedesigner specifies an alternative design or technology, as part of the LandscapeDocumentation Package, and clearly demonstrates no runoff or erosion will occur. Preventionof runoff and erosion must be confirmed during the irrigation audit.(2) Hydrozone(A) Each valve shall irrigate a hydrozone with similar site, slope, sun exposure, soil conditions,and plant materials with similar water use.(B) Sprinkler heads and other emission devices shall be selected based on what is appropriatefor the plant type within that hydrozone.(C) Where feasible, trees shall be placed on separate valves from shrubs, groundcovers, andturf.(D) Individual hydrozones that mix plants of moderate and low water use, or moderate andhigh water use, may be allowed if:1. plant factor calculation is based on the proportions of the respective plant water uses andtheir plant factor; or2. the plant factor of the higher water using plant is used for calculations.(E) Individual hydrozones that mix high and low water use plants shall not be permitted.(F) On the landscape design plan and irrigation design plan, hydrozone areas shall bedesignated by number, letter, or other designation. On the irrigation design plan, designate the1545
Page 1 and 2: LIVERMORECALIFORNIAPLANNING COMMISS
Page 3 and 4: Since the City did not adopt an ord
Page 6 and 7: Hydrozones, Plant Factors, and Irri
Page 9: Staff also recommends that if grey
Page 12 and 13: 7. California Invasive Plant Counci
Page 14 and 15: On the motion by Commissioner , sec
Page 16 and 17: 1. All new homeowner provided lands
Page 18 and 19: is based upon the area's reference
Page 20 and 21: B. The property owner shall submit
Page 22 and 23: than 10 feet wide 0.4F. Landscape D
Page 24 and 25: H. Irrigation Schedules. Irrigation
Page 26 and 27: 3. The city shall also recognize th
Page 28 and 29: Title 23. WatersDivision 2. Departm
Page 30 and 31: (n) "established landscape" means t
Page 32 and 33: (ss) "overhead sprinkler irrigation
Page 34 and 35: (c) Upon approval of the Landscape
Page 36 and 37: (2) In this next hypothetical examp
Page 38 and 39: 4. total soluble salts;5. sodium;6.
Page 42 and 43: areas irrigated by each valve, and
Page 44 and 45: (5) Each irrigation schedule shall
Page 46 and 47: (b) Model Homes. All model homes th
Page 48 and 49: 52Appendix A - Reference Evapotrans
Page 50 and 51: Independence 1.7 27 3A 6.6 8.5 9.5
Page 52 and 53: 56King City 1.7 2.0 3.4 4.4 4.4 5.6
Page 54 and 55: 58County and City Jan Feb Mar Apr M
Page 56 and 57: Gerber Dryland 0.9 1.6 3.2 4.7 6.7
Page 58 and 59: SECTION B. WATER BUDGET CALCULATION
Page 60 and 61: Estimated Total Water Use =gallonsS
Page 62 and 63: Fax No.TitleEmail AddressLicense No
Page 64 and 65: Draft 10-13-101. New construction a
Page 66 and 67: Draft 10-13-1019. "Drought tolerant
Page 68 and 69: Draft 10-13-10equipment, proper ins
Page 70 and 71: 74Draft 10-13-1079. "Rehabilitated
Page 72 and 73: Draft 10-13-103. Irrigation schedul
Page 74 and 75: Draft 10-13-10Uncovered pools and s
Page 76 and 77: Draft 10-13-10shall be submitted as
Page 78 and 79: Draft 10-13-103. Irrigation Design
Page 80 and 81: Draft 10-13-10purposes of 13.25.060
Page 82 and 83: Draft 10-13-10b. All of the followi
Page 84 and 85: Draft 10-13-103. Attaining to the g
Page 86 and 87: STATE OF CALIFORNIADEPARTMENT OF FO
Page 88 and 89: Album vineale L. non Sch.-Bip. ex R
Page 90 and 91:
B Centaurea sulphurea Wind. Sicilia
Page 92 and 93:
B Fulona citiosa (Thunbcrg) Nakai h
Page 94 and 95:
Pennisetum clandestinum Chiov.K kuy
Page 96 and 97:
A Sphaerophysa salsula (Pall.) DC.
Page 98 and 99:
Cal-[PC: The Inventory Database Pag
Page 100 and 101:
Cal-IPC: The Inventory DatabasePage
Page 102 and 103:
Cal-IPC: The Inventory Database Pag
Page 104 and 105:
Cal-IPC: The Inventory DatabasePage
Page 106 and 107:
Ca-IPC: The Inventory Database Page
Page 108 and 109:
Ca1- PC: The Inventory Database Pag
Page 110:
NOTES
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